[R] simple mixture

[Emmanuel Paradis]

Dear All,

I am trying to do some simple mixture analyses. For instance, I have a
sample of n observations and I suspect they come from two different
exponential distributions with parameters rate1 and rate2, respectively.
So, I want to estimate rate1, rate2, and the proportions of both kinds of
individuals in the sample. I had a look at the packages mda and mclust, but
they do not seem to do this kind of analysis.

Has anybody tried to program such simple mixture analysis in R? Also, I am
interested in testing the hypothesis that the suspected heterogeneity is
significant: are there any method in R for such a test?

Thanks in advance for any help.

Emmanuel Paradis
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